Retractable truck bed cover having slat array with flexible joiner members and shielded seams

ABSTRACT

A retractable truck bed cover having an array of parallel aluminum slats joined together by connective hinges including leading and trailing edge configuration for improving the security of the cover by covering and concealing the seam between adjacent slats while improving the connective hinge&#39;s resistance to the effects of aging and/or exposure to temperature fluctuations. The truck bed cover connective hinge slat is designed to be in an array of discrete slats, which are joined to one another by means of joiner members secured at each end to slat end caps. The distal ends of the joiner members are attached to slat end caps at the distal ends of the slats, thereby preventing the joiner members from shrinking in relationship to the slats due to aging and/or exposure to temperature fluctuations.

CROSS-REFERENCE TO RELATED APPLICATIONS

Applicant hereby incorporates by reference the disclosures ofApplicant's U.S. Pat. No. 5,252,950, entitled “Rolling cover for a truckutility bed having improved reel support housing and guide trackclamps,” U.S. Pat. No. 5,330,246, entitled “Slat block and guide trackapparatus for rolling truck bed cover,” and U.S. Pat. No. 6,113,176,entitled “Slat house hinge for laminated retractable truck bed cover.”

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

N/A

BACKGROUND OF THE INVENTION

Field of the Invention

This invention relates generally to a retractable truck bed cover madeup of an array of parallel aluminum slats joined together along eachslat's leading and trailing edges for water integrity, security andflexibility.

Description of the Prior Art

The design and use of retractable truck bed covers with open bed pickuptrucks to provide security and protection for cargo items carried withinthe truck bed is well known. Conventional retractable truck bed coverscommonly include a plurality of individual slats hingedly connected toform a slat array. The hinged connection of individual slats enables theslat array to form a continuous cover that, once mounted in a pair ofside rails, can be moved from a first flat position covering the truckbed to a second stored position where the cover is retracted (rolled up)on a reel or spindle in a housing.

One type of slat array design for conventional retractable truck bedcovers is defined by rigid individual slats, generally extruded orformed aluminum, which are arranged together along their edges such thattheir edges are overlapped and covered with a pliable, continuoussurface material laminate. In this laminated slat array design, theindividual slats overlap, engaging one another in an interlocking joint,while the laminate surface material functions to secure the overlappingslats together, to form an articulating cover body.

Another type of slat array design for conventional retractable truck bedcovers is defined by rigid slats joined together along their edges withconnective hinge bodies such that they are immediately contiguous to oneanother with adjacent slats fastened together without overlapping. Forthis connective hinge slat array design, flexible joiner members arecommonly utilized as connective hinge bodies to attach adjacentindividual slats by engaging and extending (or bridging) betweenreceptor channels disposed in the opposing edges of the adjacent slats.In this regard, the joiner members are operative to both attach theslats together and enable the desired hinging movement between adjacentslats because of their flexibility. The joiner members also function asthe water seal or gasket between the contiguous slats and therefore, tofunction effectively, must be continuous from end to end (along theentire length) of the contiguous slats.

While this connective hinge type of slat array design provides somemanufacturing efficiencies, it is also subject to some well-knownweaknesses and vulnerabilities. One such weakness comes from the ease inwhich the individual slats can be separated. Because the individualslats are arranged so that they do not overlap when joined together andare not covered by a laminate surface material, the seam betweenindividual slats remains exposed. If a box cutter, razor knife, or otherblade is simply inserted into and run along the exposed seam betweencontiguous slats, the joiner member can be cut, thereby detaching thecontiguous slats and breaching the security of the cover. Anothervulnerability relates to the tendency for the joiner member, which aretypically extruded silicon, to contract over time due to aging and/orexposure to temperature fluctuations. This shrinkage often results inthe joiner members no longer extending from end to end of contiguousslats, leaving the end portions of such contiguous slats that make upthe slatted array with exposed spaces between the slats and compromisingthe water tightness of the cover body.

Accordingly, there remains a need for a modified retractable truck bedcover design which would eliminate exposed seam security vulnerabilityof conventional connective hinge style slats when placed in a slatarray. It would be helpful if such a modified truck bed cover slat wasable to protect the joiner member connecting adjacent slats in an arraywithout requiring a restrictive overlap or interlock between adjacentslats. It would be additionally desirable for such a modified truck bedcover slat to overcome the problem of joiner member shrinkage and theassociated issue of water penetration.

The Applicant's invention described herein provides for an improvedretractable truck bed cover slat with connective hinge style slatsarranged in a slat array that employs a means to address theshortcomings of prior art designs by protecting the attaching joinermember between contiguous slats while also preventing the joiner memberfrom shrinking and contracting. The primary components of Applicant'smodified truck bed cover slat are an aluminum base slat, a siliconjoiner member, and a molded slat end cap. When in operation, themodified truck bed cover slat allows the assembly of a slat array whichimproves the security provided by conventional connective hinge slattedtruck bed covers and addresses other limitations or shortcomings imposedby the conventional slat structures in the prior art.

SUMMARY OF THE INVENTION

A retractable truck bed cover comprising an array of parallel elongated,extruded aluminum slats joined together along their overlapped leadingand trailing edges by flexible silicon hinges. The truck bed coverconnective hinge slat improves the security of the cover by shieldingaccess to the seam between adjacent slats while enabling stabilizationof the silicone hinge joiner strip. Applicant's connective hinge slat isdesigned to be used in an array of discrete, adjacent slats which areeach interconnectedly joined together sequentially through discretejoiner members, the distal ends of which are held fast to slat end caps,forming a continuous slat array suitable for use as a retractable truckbed cover.

Each slat includes a slat surface having a leading edge defined by aninverted step nib and trailing edge defined by an upright step nib. Whentwo slats are placed contiguously with the first slat's leading edgeagainst the second slat's trailing edge, the shape of the inverted stepnib and the upright step nib form an over and under half lap splicejoint between the first slat and the second slat that provides aredundant structural barrier covering and protecting the seam areadisposed between the two adjacent slats. Extending downward from theslat surface, on both the leading edge side and the trailing edge side,are mirror image receptor channels which are adapted to receive and holdthe connector section of a hinge joiner member for the entire length ofeach slat.

Each slat joiner member is a single, flexible body which has a hingesection at its center that is designed to improve the flexibility of thejoiner member and is disposed between two mirror image connectorsections or bosses which are each sized and shaped to sleeve into and becaptured within the receptor channels of opposing slats. Two adjacentslats can thus be joined together at their leading and trailing edgesthrough the connector section on one side of the joiner member beingplaced in the receptor channel on the leading edge side of the firstslat and the connector section on the other side of the same joinermember being placed in the receptor channel on the trailing edge side ofthe second slat (or vice versa). The joined adjacent slats retain theability to pivotally hinge through the flexibility of the hinge sectionof the joiner member and the non-restrictive half lap splice lap jointto allow the truck bed cover to be retracted and extended.

At each end of each discrete slat is a slat end cap independentlypositioned and engaged to the end of the slat, and secured theretothrough the use of a rivet fastener. Each slat end cap is additionallyfastened to the end connector section of the joiner member in onereceptor channel of the respective slat. Through its engagement to theend of the slat and attachment to the end of the joiner member, the slatend cap provides a means for maintaining the joiner members fixed to theends of the slat preventing the joiner member from shrinking due toaging or temperature fluctuations and the resultant leaks in theperipheral edges of the slatted cover. The slat end caps also functioncollectively as the primary bearing surface upon which the cover bodyassembly is carried within the supporting side tracks.

It is an object of this invention to provide a truck bed coverconnective hinge slat which eliminates the exposed seam securityvulnerability of conventional connective hinge slats when placed in aslat array.

It is another object of this invention to provide a truck bed coverconnective hinge slat which protects the joiner member connectingadjacent slats in an array without requiring a restrictive overlap orinterlock between adjacent slats.

It is yet another object of this invention to prevent the contraction orshrinkage of the joiner member connecting adjacent connective hingeslats due to aging or exposure to temperature fluctuations.

It is still another object of this invention to provide a bearingsurface beneath an array of connective hinge slats that reduces frictionand ensures smooth operation of the slatted cover body within the sidesupport tracks of a retractable truck bed cover assembly.

These and other objects will be apparent to one of skill in the art.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a truck bed cover built in accordancewith the present invention installed onto a conventional pickup truckutility bed.

FIG. 1A is a perspective cut away view of the slat ends.

FIG. 2 is a side elevational view of a truck bed cover slat built inaccordance with the present invention.

FIG. 3 is a side elevational view of the joiner member of a modifiedtruck bed cover slat built in accordance with the present invention.

FIG. 4A is a side cross-sectional view of two adjacent truck bed coverslats connected with a joiner member in accordance with the presentinvention in a flat position which would represent covering a truck bed.

FIG. 4B is a side cross-sectional view of two adjacent truck bed coverslats connected with a joiner member in accordance with the presentinvention in a rolled up position showing the angular motion permittedwith the present hinge joiner member.

FIG. 5 is a perspective view of the slat end cap of a truck bed coverslat built in accordance with the present invention.

FIG. 6A is an exploded perspective view of a truck bed cover slatassembly with an extended joiner member and slat end cap built inaccordance with the present invention.

FIG. 6B is a top plan view of a truck bed cover slat assembly with anextended joiner member and slat end cap built in accordance with thepresent invention.

FIG. 6C is a side elevational view of a truck bed cover slat assemblywith slat end caps built in accordance with the present invention.

FIG. 6D is a bottom plan view of a truck bed cover slat assembly withslat end cap built in accordance with the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring now to the drawings and in particular FIG. 1 and FIG. 1A, aretractable truck bed cover 100 in accordance with the present inventionis shown having a plurality of parallel slats 110 disposed in acontiguous arrangement and attached together. A connective hinge 120 isdisposed between each slat 110, enabling the plurality of slats 110 toform a single slat array which defines the body of the truck bed cover100. A slat end cap 130 is secured to the end of each discrete slat 110.The roll-up truck bed cover 100 slat array in accordance with thepresent invention is mounted inside a guide track 140 connected to theside 101 of the pickup truck with the slat end caps 130 providing theprimary bearing surface upon which the cover body assembly is carriedwithin the supporting side tracks.

In the preferred embodiment, each slat 110 is a rigid, elongatedaluminum extruded strip which is sized to reach from one side of thetruck bed to the other laterally. Along each sidewall 101 of the truckbed are mounted a pair of guide tracks 140 that are connected to thetruck bed walls 101 as described in Applicant's previous patents citedabove. As will be described in more detail below, the body of each slat110 has integrally formed therein a receptor channel on both the leadingand trailing edges that extend for the length of the slat. The receptorchannels receive and capture one end of a joiner member, with the otherend of the joiner member captured by the opposing receptor channel ofthe adjacent slat 110, forming the connective hinge 120 which enablesthe slats 110 to interlock pivotally with the adjacent slats 110 in anedge-to-edge array. Each joiner member extends the entire length of aslat and is fastened to an end cap 130 at each end of slat 110. Eachslat additionally includes a slat end cap 130 secured to each slat endwhich maintains and secures each end of the joiner member in thereceptor channel to the end of its respective slat 110 to preventshrinkage.

Referring now to FIG. 2, each discrete slat 110 includes slat surface111 having a leading edge 112 and trailing edge 113. The leading edge112 is defined by an inverted step nib which forms a first structuralbarrier to the seam area disposed between two adjacent slats 110arranged contiguously, edge-to-edge. The trailing edge 113 is defined byan upright step nib which forms a second structural barrier to the seamarea disposed between two adjacent slats 110 arranged contiguously,edge-to-edge. When two slats 110 are placed contiguously with the firstslat's 110 leading edge 112 against the second slat's 110 trailing edge113, the shape of the inverted step nib and the shape of the uprightstep nib form a half lap splice lap joint between the first slat 110 andthe second slat 110.

Integral with the slat surface 111, on both the leading edge 112 sideand the trailing edge 113 side, are mirror image receptor channels 114which extend downwardly below the slat surface 111. The mirror imagereceptor channel 114 on the side of the leading edge 112 includes anopen end which faces towards the leading edge 112 and the mirror imagereceptor channel 114 on the side of the trailing edge 113 and includesan open end which faces towards the leading edge 112. The receptorchannels 114 enable the slat 110 to receive and hold a connector sectionof the joiner member shown in FIG. 3.

Referring now to FIGS. 2 and 3, a joiner member 150 in accordance withthe preferred embodiment of the present invention defines a singlecontinuous body constructed out of a flexible material such as siliconand which has a hinge section 151 disposed between two mirror imageconnector sections 152. Despite the joiner member 150 being constructedout of a flexible material, the hinge section 151 additionally includesa narrowing area 153 to enable greater flexibility to bend and allowhinging movement.

Each connector section 152 is sized and shaped to slide into and becaptured within a receptor channel 114 of a slat 110 built in accordancewith the present invention. In this regard, a first slat 110 and asecond slat 110 can be locked together in a contiguous arrangement thatstill permits hinging movement between slats when the connector section152 on one side of the joiner member 150 is held in place in thereceptor channel 114 on the leading edge 112 of the first slat 110 andthe connector section 152 on the opposite side of the same joiner member150 is held in place by the trailing edge 113 of the second slat 110.Each connector section 152 additionally includes a retention aperture154 at its center which runs longitudinally and therefore runsthroughout the length of the joiner member 150. The retention aperture154 is sized to receive an end retention screw that enables a slat endcap to be fastened to joiner member 150.

In the preferred embodiment, the slats 110 are constructed of extrudedaluminum and the joiner members 150 are constructed out of extrudedsilicon. It is additionally contemplated that the surface of the slats110 may include a powder-coat or anodized finish that improves theoverall appearance of the cover body assembly.

Referring now to FIG. 4A, a first slat 110 and a second slat 110(collectively, slats 110) are shown locked together by a joiner member150 and in a flat position, wherein the slats 110 are in the same plane,constituting the covered truck bed position. The first slat 110 ispositioned with its trailing edge 113 adjacent to the leading edge 112of the second slat 110. Together, the trailing edge 113, leading edge112, and joiner member 150 form the connective hinge of the first slat110 and the second slat 110. With the first slat 110 and the second slat110 in the flat position, the half lap splice lap joint remains in aclosed position. The closed half lap splice lap joint forms an offsetseam, which is operative to prevent any blade or slicing structure frompassing through the seam and cutting the joiner member 150. As such, theclosed half lap splice lap joint effectively protects the joiner member150 which connects the adjacent slats 110 and eliminates the exposedseam security vulnerability present in conventional connective hingeslats.

The joiner member 150 includes two retention apertures 154, one at thecenter of each connector section 152. The retention apertures 154 eachrun longitudinally through the length of the joiner member 150. Thejoiner members are cut flush with the ends of the slats and aretherefore equal in length to the slats. When slats 110 and joinermembers 150 are assembled into a slat array, the ends of each joinermember 150, and accordingly the retention apertures 154 within theconnector sections 152 of each joiner member 150, are accessible at theends of the slats 110. The purpose of the retention apertures 154 is toprovide an attachment receptacle to enable each end of joiner members150 to be secured to the end of the slats and to a molded end fitting,defined as the slat end cap, which is positioned and independentlysecured to each end of each slat 110 to prevent the joiner member 150from shrinking and drawing away from the ends of the slats 110.

Referring now to FIG. 4B, a first slat 110 and a second slat 110(collectively, slats 110) are shown locked together by a joiner member150, but pivotally hinged into an acute angle relative to each other.The movement to an acute angle deforms the hinge section 151 of thejoiner member 150 as the opposing connector sections 152 are pivotallyfolded inward relative to and toward one another.

Due to the narrowing of the hinge section 151 and the use of the halflap splice lap joint, the extent of the acute angle in which the slats110 can be moved is limited only by the eventual contact of the opposingreceptor channel 114 of the first slat 110 with the receptor channel 114of the second slat 110. Indeed, the use of a half lap splice lap jointis specifically contemplated to provide an obstruction for the seambetween slats 110 that does not restrict the desired hinged movement. Assuch, it is understood that the capability to hinge contiguous, adjacentslats 110 into such an acute angle relative to one another enables atruck bed cover in accordance with the present invention (i.e., definedby slats 110 locked together by joiner members 150 into a slat array) tobe rolled up in a smaller stored position in a manner similar to myprevious patents cited above.

Referring now to FIGS. 5, 6A, 6B, 6C, and 6D, each slat end cap 130 isdefined by a molded body having an end flange portion 131 and a tongueflange portion 132 with integral J section 133. The end flange portion131 of the slat end cap 130 fits at a ninety (90) degree relationship tothe slat's 110 longitudinal dimension and includes a countersunk hole134 through its planar surface which aligns with the retention aperture154 in the connector section 152 of the joiner member 150 when thetongue flange portion 132 is press-fit into the space between thereceptor channels 114 of the slat 110. An end retention screw 136 passesthrough the countersunk hole 134 and into the retention aperture 154 tosecure the joiner member 150 to the slat end cap 130. The tongue flangeportion 132 of the molded slat end cap 130 also includes a cap rivethole 137 in its planar surface, and when the tongue flange 132 ispress-fit into the space between the receptor channels 114, the caprivet hole 137 aligns with a corresponding slat rivet hole 115 in theend of the slat 110. The slat end cap 130 is permanently affixed to theend of the slat 110 by way of a rivet 138 which is passed though boththe slat rivet hole 115 and the cap rivet hole 137 when the slat end cap130 is in place on the end of the slat 110. As the slat end cap 130 ispress-fitted into place, it also causes the J section 133 of the tongueflange 132 to align with and sleeve over the end portion of one receptorchannel 114 of the slat 110. The bottom surface 139 of the J section 133is then beneath the receptor channel 114, and being constructed of aspecially formulated nylon, enables the J sections 133, one at the endof every slat 110 in the cover body 100 to collectively provide abearing surface for the underside of the cover body 100 at the points atwhich the cover body slats 110 engage the supporting side tracks of theretractable truck bed cover assembly 100.

The retractable truck bed cover described herein can be securely lockedin place covering the entire truck bed or rolled up in a housing asdescribed in applicants' patent cited above.

The instant invention has been shown and described herein in what isconsidered to be the most practical and preferred embodiment. It isrecognized, however, that departures may be made therefrom within thescope of the invention and that obvious modifications will occur to aperson skilled in the art.

What is claimed is:
 1. A cover for a truck bed, the cover comprising: a plurality of adjacent slats, each of the plurality of adjacent slats comprising: a trailing edge; a leading edge being on an opposite side of a width of the slat from the trailing edge; an outer planar slat surface; an inner planar slat surface; a thickness between the outer planar surface of the slat and the inner planar surface of the slat; a first step nib on the leading edge of the slat; and a second step nib on the trailing edge of the slat, the second step nib configured to mate with the first step nib of an adjacent slat to form a closed joint limiting access from outside when the cover is in a closed extended position; wherein the first step nib and the second step nip of each of the plurality of slats are located within the thickness of the slat.
 2. The cover of claim 1, further comprising at least one receptor channel extending downwardly from the thickness of each of the plurality of adjacent slats.
 3. The cover of claim 2, further comprising a connector section configured to be located within the at least one receptor channel of adjacent slats.
 4. The cover of claim 3, wherein the connector section is flexible.
 5. The cover of claim 3, wherein each of the plurality of adjacent slats comprise aluminum and the connector section comprises silicon.
 6. The cover of claim 3, wherein each of the plurality of adjacent slats comprise a protrusion extending downward from the thickness of the slat which is configured to mate with an upper surface of the connector section.
 7. The cover of claim 1, wherein the at least one receptor located on the leading edge of a slat is a mirror image of an at least one receptor located on the trailing edge of an adjacent slat.
 8. The cover of claim 1, wherein the first step nib and the second step nip are located fully within the thickness of the slat.
 9. The cover of claim 1, wherein the leading edge and the trailing edge of each of said plurality of adjacent slats are configured to form a half lap splice lap joint when the leading edge of a first slat member is connected with the trailing edge of a second slat member.
 10. A system for covering a truck bed, the system comprising: a pair of guide rails; and a plurality of adjacent slats, each of the plurality of adjacent slats comprising: a trailing edge; a leading edge being on an opposite side of a width of the slat from the trailing edge; an outer planar slat surface; an inner planar slat surface; a thickness between the outer planar surface of the slat and the inner planar surface of the slat; a length extending between the plurality of guiderails; a first step nib on the leading edge of the slat; and a second step nib on the trailing edge of the slat, the second step nib configured to mate with the first step nib of an adjacent slat to form a joint; wherein the plurality of adjacent slats are configured to slide within the pair of guide rails; and wherein the first nib and the second nip of each of the plurality of slats are located between the outer planar slat surface and the inner planar slat surface of the slat and further comprising at least one receptor channel extending downwardly from the inner surface of each of the plurality of adjacent slats.
 11. The system of claim 10, wherein the first step nib and the second step nib overlap at the joint.
 12. The cover of claim 10, further comprising a connector section located within the at least one receptor channel of adjacent slats.
 13. The cover of claim 12, wherein the connector section is flexible.
 14. The cover of claim 12, wherein the plurality of slats comprise aluminum and the connector section comprises silicon.
 15. The cover of claim 12, wherein each of the plurality of adjacent slats comprising a protrusion extending into the thickness of the slat and configured to mate with an upper surface of the connector section.
 16. The cover of claim 10, wherein the at least one receptor located on the leading edge of a slat is a mirror image of at least one receptor located on the trailing edge of an adjacent slat.
 17. The cover of claim 10, wherein the first step nib and the second step nip are located fully within the thickness of the slat.
 18. The cover of claim 10, wherein the leading edge and the trailing edge of each of said plurality of adjacent slats are configured to form a half lap splice lap joint when the leading edge of a first slat member is connected with the trailing edge of a second slat member. 